--- a/layout/generic/crashtests/crashtests.list
+++ b/layout/generic/crashtests/crashtests.list
@@ -20,17 +20,17 @@ load 309322-1.html
 load 309322-2.html
 load 309322-3.html
 load 309322-4.html
 load 310556-1.xhtml
 load 321224.xul
 load 322780-1.xul
 load 323381-1.html
 load 323381-2.html
-asserts-if(gtkWidget,1) asserts-if(Android&&asyncPan,1) asserts-if(stylo&&!(cocoaWidget&&isDebugBuild),1) load 323386-1.html # Bug 718883
+asserts-if(gtkWidget,1) asserts-if(Android&&asyncPan,1) asserts-if(stylo&&gtkWidget&&!isDebugBuild,1) load 323386-1.html # Bug 718883
 load 323389-1.html
 load 323389-2.html
 load 323493-1.html
 load 323495-1.html
 load 324318-1.html
 load 328946-1.html
 load 331284-1.xhtml
 load 331292.html

--- a/layout/reftests/border-image/reftest.list
+++ b/layout/reftests/border-image/reftest.list
@@ -12,18 +12,18 @@ fuzzy-if(winWidget,1,1) == multicolor-im
 == transparent-image-1.html transparent-image-1-ref.html
 != repeat-image-1.html repeat-image-1-ref.html
 fuzzy-if(webrender,15-15,975-975) == 470250-1.html 470250-1-ref.html
 fuzzy-if(webrender,15-15,975-975) == 470250-2.html 470250-2-ref.html
 != different-h-v-1.html different-h-v-ref.html
 != different-h-v-2.html different-h-v-ref.html
 != different-h-v-1.html different-h-v-2.html
 == center-scaling-1.html center-scaling-1-ref.html
-fails-if(Android) fails-if(usesRepeatResampling) == center-scaling-2.html center-scaling-2-ref.html # Android: very different scaling (blurriness) on some sides
-fails-if(Android) fails-if(usesRepeatResampling) == center-scaling-3.html center-scaling-3-ref.html # Android: very different scaling (blurriness) on some sides
+fails-if(Android) fails-if(usesRepeatResampling&&!styloVsGecko) == center-scaling-2.html center-scaling-2-ref.html # Android: very different scaling (blurriness) on some sides
+fails-if(Android) fails-if(usesRepeatResampling&&!styloVsGecko) == center-scaling-3.html center-scaling-3-ref.html # Android: very different scaling (blurriness) on some sides
 == center-scaling-4t.html center-scaling-4t-ref.html
 == center-scaling-4r.html center-scaling-4r-ref.html
 == center-scaling-4b.html center-scaling-4b-ref.html
 == center-scaling-4l.html center-scaling-4l-ref.html
 == center-scaling-4tb.html center-scaling-4tb-ref.html
 == center-scaling-4lr.html center-scaling-4lr-ref.html
 == side-scaling-1h.html side-scaling-1h-ref.html
 == side-scaling-1v.html side-scaling-1v-ref.html

--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1009,17 +1009,17 @@ asserts(1) asserts-if(styloVsGecko,2) ==
 == 421234-1.html 421234-1-ref.html
 == 421239-1.html 421239-1-ref.html
 == 421239-2.html 421239-2-ref.html
 == 421419-1.html 421419-1-ref.html
 == 421436-1a.html 421436-1-ref.html
 == 421436-1b.html 421436-1-ref.html
 fuzzy-if(skiaContent,1,5) == 421632-1.html 421632-1-ref.html
 != 421710-1.html about:blank
-fails-if(Android) fails-if(usesRepeatResampling) == 421885-1.xml 421885-1-ref.xml
+fails-if(Android) fails-if(usesRepeatResampling&&!styloVsGecko) == 421885-1.xml 421885-1-ref.xml
 == 421955-1.html 421955-1-ref.html
 == 422249-1.html 422249-1-ref.html
 == 422394-1.html 422394-1-ref.html
 == 422678-1.html 422678-1-ref.html
 == 423130-1.html 423130-1-ref.html
 == 423385-1.html 423385-1-ref.html
 random-if(gtkWidget) == 423599-1.html 423599-1-ref.html # bug 1309095
 == 423676-1.html 423676-1-ref.html
@@ -1159,23 +1159,23 @@ fuzzy-if(skiaContent,1,3) == 442542-1.ht
 == 444928-2.html 444928-2-ref.html
 != 444928-3.html 444928-3-notref.html
 random == 445004-1.html 445004-1-ref.html # bug 472268
 == 445142-1a.html 445142-1-ref.html
 == 445142-1b.html 445142-1-ref.html
 == 445142-1c.html 445142-1-ref.html
 == 445142-2a.html 445142-2-ref.html
 == 445142-2b.html 445142-2-ref.html
-fails-if(usesRepeatResampling) == 446100-1a.html about:blank
-fails-if(Android) fails-if(usesRepeatResampling) == 446100-1b.html about:blank
-fails-if(Android) fails-if(usesRepeatResampling) == 446100-1c.html about:blank
-fails-if(usesRepeatResampling) == 446100-1d.html about:blank
-fails-if(usesRepeatResampling) == 446100-1e.html about:blank
+fails-if(usesRepeatResampling&&!styloVsGecko) == 446100-1a.html about:blank
+fails-if(Android) fails-if(usesRepeatResampling&&!styloVsGecko) == 446100-1b.html about:blank
+fails-if(Android) fails-if(usesRepeatResampling&&!styloVsGecko) == 446100-1c.html about:blank
+fails-if(usesRepeatResampling&&!styloVsGecko) == 446100-1d.html about:blank
+fails-if(usesRepeatResampling&&!styloVsGecko) == 446100-1e.html about:blank
 == 446100-1f.html about:blank
-fails-if(usesRepeatResampling) fails-if(Android) == 446100-1g.html about:blank
+fails-if(usesRepeatResampling&&!styloVsGecko) fails-if(Android) == 446100-1g.html about:blank
 == 446100-1h.html about:blank
 == 447749-1.html 447749-1-ref.html
 fuzzy(127,2) == 448193.html 448193-ref.html
 != 449149-1a.html about:blank
 != 449149-1b.html about:blank
 # Retry the above with XBL scopes
 test-pref(dom.use_xbl_scopes_for_remote_xul,true) != 449149-1a.html about:blank
 test-pref(dom.use_xbl_scopes_for_remote_xul,true) != 449149-1b.html about:blank
@@ -1254,17 +1254,17 @@ fails-if(!styloVsGecko) == 472020-2.xul 
 == 472500-1.xul 472500-1-ref.xul
 == 472769-1a.html 472769-1-ref.html
 == 472769-1b.html 472769-1-ref.html
 == 472769-2.html 472769-2-ref.html
 == 472769-3.html 472769-3-ref.html
 == 473847-1.xul 473847-1-ref.xul
 fuzzy-if(skiaContent,1,16) == 474336-1.xul 474336-1-ref.xul
 == 474417-1.html 474417-1-ref.html
-fuzzy-if(skiaContent,1,5) == 474472-1.html 474472-1-ref.html
+fuzzy-if(skiaContent,1,5) skip-if((stylo||styloVsGecko)&&isDebugBuild&&winWidget) == 474472-1.html 474472-1-ref.html # Bug 1383845
 == 475986-1a.html 475986-1-ref.html
 == 475986-1b.html 475986-1-ref.html
 == 475986-1c.html 475986-1-ref.html
 == 475986-1d.html 475986-1-ref.html
 == 475986-1e.html 475986-1-ref.html
 == 475986-1f.html 475986-1-ref.html
 == 475986-2a.html 475986-2-ref.html
 == 475986-2b.html 475986-2-ref.html
@@ -1984,17 +1984,17 @@ fuzzy-if(Android,27,874) fuzzy-if(gtkWid
 fuzzy(2,320000) == 1315113-1.html 1315113-1-ref.html
 fuzzy(2,20000) == 1315113-2.html 1315113-2-ref.html
 == 1315632-1.html 1315632-1-ref.html
 fuzzy(2,40000) fuzzy-if(webrender,1-2,349-349) == 1316719-1a.html 1316719-1-ref.html
 fuzzy(2,40000) fuzzy-if(webrender,1-2,349-349) == 1316719-1b.html 1316719-1-ref.html
 fuzzy(2,40000) fuzzy-if(webrender,1-1,323-323) == 1316719-1c.html 1316719-1-ref.html
 skip-if(Android) != 1318769-1.html 1318769-1-ref.html
 == 1322512-1.html 1322512-1-ref.html
-== 1330051.svg 1330051-ref.svg
+skip-if((stylo||styloVsGecko)&&isDebugBuild&&winWidget) == 1330051.svg 1330051-ref.svg
 == 1348481-1.html 1348481-ref.html
 == 1348481-2.html 1348481-ref.html
 == 1352464-1.html 1352464-1-ref.html
 == 1358375-1.html 1358375-ref.html
 == 1358375-2.html 1358375-ref.html
 == 1358375-3.html 1358375-ref.html
 == 1364280-1.html 1364280-1-ref.html
 == 1364280-2a.html 1364280-2-ref.html

--- a/layout/reftests/css-gradients/reftest.list
+++ b/layout/reftests/css-gradients/reftest.list
@@ -4,22 +4,22 @@ fuzzy-if(!contentSameGfxBackendAsCanvas,
 == linear-diagonal-2a.html linear-diagonal-2-ref.html
 == linear-diagonal-3a.html linear-diagonal-3-ref.html
 == linear-diagonal-4a.html linear-diagonal-4-ref.html
 == linear-premul.html linear-premul-ref.html
 
 fuzzy(1,800000) == linear-flipped-1.html linear-flipped-1-ref.html
 == linear-position-1a.html linear-position-1-ref.html
 == linear-repeat-1a.html linear-repeat-1-ref.html
-fails-if(d2d) == linear-repeat-1b.html linear-repeat-1-ref.html # bug 582236
+fails-if(d2d&&!styloVsGecko) == linear-repeat-1b.html linear-repeat-1-ref.html # bug 582236
 == linear-repeat-1c.html linear-repeat-1-ref.html
-fails-if(d2d) == linear-repeat-1d.html linear-repeat-1-ref.html # bug 582236
+fails-if(d2d&&!styloVsGecko) == linear-repeat-1d.html linear-repeat-1-ref.html # bug 582236
 == linear-repeat-1e.html linear-repeat-1-ref.html
-fails-if(d2d) == linear-repeat-1f.html linear-repeat-1-ref.html # bug 582236
-fails-if(d2d) == linear-repeat-1g.html linear-repeat-1-ref.html # bug 582236
+fails-if(d2d&&!styloVsGecko) == linear-repeat-1f.html linear-repeat-1-ref.html # bug 582236
+fails-if(d2d&&!styloVsGecko) == linear-repeat-1g.html linear-repeat-1-ref.html # bug 582236
 fuzzy-if(skiaContent,1,500) == linear-rotated-1.html linear-rotated-1-ref.html
 fuzzy-if(winWidget,1,36000) fuzzy-if(skiaContent,1,45000) == linear-size-1a.html linear-size-1-ref.html
 == linear-stops-1a.html linear-stops-1-ref.html
 == linear-stops-1b.html linear-stops-1-ref.html
 == linear-stops-1c.html linear-stops-1-ref.html
 == linear-stops-1d.html linear-stops-1-ref.html
 == linear-stops-1e.html linear-stops-1-ref.html
 == linear-stops-1f.html linear-stops-1-ref.html

--- a/layout/reftests/image-element/reftest.list
+++ b/layout/reftests/image-element/reftest.list
@@ -13,17 +13,17 @@ fails-if(azureSkia) fails-if(cocoaWidget
 HTTP(..) == element-paint-continuation.html element-paint-continuation-ref.html
 == element-paint-transform-01.html element-paint-transform-01-ref.html
 random-if(d2d) == element-paint-transform-02.html element-paint-transform-02-ref.html # bug 587133
 fuzzy-if(d2d&&/^Windows\x20NT\x206\.1/.test(http.oscpu),16,90) == element-paint-background-size-01.html element-paint-background-size-01-ref.html
 == element-paint-background-size-02.html element-paint-background-size-02-ref.html
 fuzzy-if(skiaContent,255,4) == element-paint-transform-repeated.html element-paint-transform-repeated-ref.html
 fuzzy-if(d2d,255,24) == element-paint-transform-03.html element-paint-transform-03-ref.html
 fuzzy-if(asyncPan,2,140) fuzzy-if(skiaContent,3,106) == element-paint-native-widget.html element-paint-native-widget-ref.html   # in -ref the scrollframe is active and layerized differently with APZ
-fails-if(usesRepeatResampling) == element-paint-subimage-sampling-restriction.html about:blank
+fails-if(usesRepeatResampling&&!styloVsGecko) == element-paint-subimage-sampling-restriction.html about:blank
 == element-paint-clippath.html element-paint-clippath-ref.html
 == element-paint-sharpness-01a.html element-paint-sharpness-01b.html
 fuzzy-if(skiaContent,1,326) == element-paint-sharpness-01b.html element-paint-sharpness-01c.html
 == element-paint-sharpness-01c.html element-paint-sharpness-01d.html
 == element-paint-sharpness-02a.html element-paint-sharpness-02b.html
 == element-paint-sharpness-02b.html element-paint-sharpness-02c.html
 == element-paint-paintserversize-rounding-01.html element-paint-paintserversize-rounding-01-ref.html
 fuzzy-if(skiaContent,187,1191) == element-paint-paintserversize-rounding-02.html element-paint-paintserversize-rounding-02-ref.html # Linux32 from GCC update

--- a/layout/reftests/image/reftest.list
+++ b/layout/reftests/image/reftest.list
@@ -1,10 +1,10 @@
 fuzzy-if(Android,8,30) == background-image-zoom-1.html background-image-zoom-1-ref.html
-fails-if(usesRepeatResampling) == background-image-zoom-2.html about:blank
+fails-if(usesRepeatResampling&&!styloVsGecko) == background-image-zoom-2.html about:blank
 == image-seam-1a.html image-seam-1-ref.html
 == image-seam-1b.html image-seam-1-ref.html
 fuzzy-if(Android,255,154) fuzzy-if(webrender,0-1,0-400) == image-seam-2.html  image-seam-2-ref.html  # Bug 1128229
 == image-zoom-1.html image-zoom-1-ref.html
 == image-zoom-2.html image-zoom-1-ref.html
 == invalid-url-image-1.html invalid-url-image-1-ref.html
 == sync-image-switch-1a.html sync-image-switch-1-ref.html
 == sync-image-switch-1b.html sync-image-switch-1-ref.html

--- a/testing/web-platform/meta/dom/interfaces.html.ini
+++ b/testing/web-platform/meta/dom/interfaces.html.ini
@@ -66,23 +66,21 @@
       if stylo: FAIL
 
   [ShadowRoot interface: attribute host]
     expected:
       if stylo: FAIL
 
   [Element interface: attribute shadowRoot]
     expected:
-      if stylo and (os == "linux"): FAIL
-      if stylo and (os == "mac"): FAIL
+      if stylo: FAIL
 
   [Element interface: element must inherit property "shadowRoot" with the proper type (25)]
     expected:
-      if stylo and (os == "linux"): FAIL
-      if stylo and (os == "mac"): FAIL
+      if stylo: FAIL
 
   [EventTarget must be primary interface of new EventTarget()]
     expected: FAIL
 
   [Stringification of new EventTarget()]
     expected: FAIL
 
   [EventTarget interface: new EventTarget() must inherit property "addEventListener" with the proper type (0)]

--- a/testing/web-platform/meta/html/semantics/forms/the-label-element/label-attributes.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-label-element/label-attributes.html.ini
@@ -1,8 +1,7 @@
 [label-attributes.html]
   type: testharness
   [A labelable element inside the shadow DOM.]
     expected:
-      if stylo and (os == "linux"): FAIL
-      if stylo and (os == "mac"): FAIL
+      if stylo: FAIL
     bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1373155
 

--- a/testing/web-platform/meta/intersection-observer/shadow-content.html.ini
+++ b/testing/web-platform/meta/intersection-observer/shadow-content.html.ini
@@ -1,8 +1,6 @@
 [shadow-content.html]
   type: testharness
   prefs: [dom.webcomponents.enabled:true]
   [Observing a target inside shadow DOM.]
     expected:
-      if stylo and (os == "linux"): FAIL
-      if stylo and (os == "mac"): FAIL
-
+      if stylo: FAIL

--- a/testing/web-platform/meta/shadow-dom/Element-interface-shadowRoot-attribute.html.ini
+++ b/testing/web-platform/meta/shadow-dom/Element-interface-shadowRoot-attribute.html.ini
@@ -3,11 +3,9 @@
   [shadowRoot attribute must return the open shadow root associated with the element]
     expected: FAIL
 
   [shadowRoot attribute must return null if the shadow root attached to the element is closed]
     expected: FAIL
 
   [shadowRoot must be defined on Element prototype]
     expected:
-      if stylo and (os == "linux"): FAIL
-      if stylo and (os == "mac"): FAIL
-
+      if stylo: FAIL

--- a/testing/web-platform/meta/shadow-dom/untriaged/elements-and-dom-objects/extensions-to-element-interface/attributes/test-006.html.ini
+++ b/testing/web-platform/meta/shadow-dom/untriaged/elements-and-dom-objects/extensions-to-element-interface/attributes/test-006.html.ini
@@ -1,7 +1,5 @@
 [test-006.html]
   type: testharness
   [A_10_02_01_06_T01]
     expected:
-      if stylo and (os == "linux"): FAIL
-      if stylo and (os == "mac"): FAIL
-
+      if stylo: FAIL